The 3300/12-01-20-00 AC Power Supply from Bently Nevada serves as the central power source for a 3300 series monitoring system. This unit occupies the first slot in the rack and delivers reliable, conditioned DC power to up to twelve monitors and their associated transducers. Moreover, this power supply simplifies rack design because a second unit never requires installation in the same rack.
Input Power
This power supply accepts a primary input of 95 to 125 Vac at 1.0 A max, or 190 to 250 Vac at 0.5 A max, single-phase, 50/60 Hz. You can change the input voltage in the field by reconfiguring a soldered jumper and replacing the external fuse. During power-up, the unit draws a surge of 26 A peak or 12 A rms for one cycle. For fuse protection, use a 1.5 A slow blow fuse for the lower voltage range and a 0.75 A slow blow fuse for the higher range.
Outputs
This unit provides user-programmable transducer power at -24 Vdc (+0%, -2.5%) or -18 Vdc (+1%, -2%) . Individual monitor circuit boards provide overload protection for each channel.
OK Relay
An OK relay resides behind the power supply at the Power Input Module. This hermetically-sealed, single-pole double-throw (SPDT) relay remains normally energized during normal operation. For resistive loads, this relay supports 5 A at 28 Vdc and 5 A at 120 Vac, 50/60 Hz. For 220 Vac applications, it supports 3 A at 50/60 Hz. Systems requiring agency approval can utilize 5 A at 28 Vdc or 5 A at 120 Vac (30 Vac for ATEX). This relay also offers a minimum contact life of 10,000 cycles under rated load conditions.
Operating Temperature
The 3300/12-01-20-00 operates effectively across a wide temperature range from 0°C to +65°C (+32°F to +150°F) .
Storage Temperature
For storage, this unit withstands temperatures from -40°C to +85°C (-40°F to +185°F) .
Humidity Tolerance
Additionally, it tolerates relative humidity levels up to 95% noncondensing.
Installation Guidance
Rack Mounting
Installing this power supply requires minimal effort. First, mount the unit in the left-most position, which is slot one, of the 3300 rack.
Voltage Configuration
Next, verify that the input voltage jumper setting matches your local mains supply. The factory configures this setting according to your order, but you can change it in the field when necessary.
Fuse and Wiring
Also, confirm you have installed the correct external fuse for your chosen voltage. After securing the unit, connect the AC mains power.
Relay Connection
Finally, wire the OK relay contacts to an external monitoring system for continuous status indication.
Packaging List
Each shipment of the 3300/12-01-20-00 includes the following items:
AC Power Supply unit
Installation and operation manual
Necessary mounting hardware
Shipping Information
We ship all orders via leading global carriers such as FedEx, UPS, and DHL to ensure fast and reliable delivery.
Q1: Can this power supply support more than 12 monitors?
A1: No, the 3300/12-01-20-00 specifically supports up to 12 monitors. For larger systems, you would need multiple racks with their own power supplies.
Q2: How do I change the input voltage on the unit?
A2: Changing the input voltage requires two steps: reconfiguring the soldered jumper and replacing the external fuse with the correct rating for the new voltage.
Q3: What does the OK relay do?
A3: The OK relay provides a status contact for external monitoring. It remains energized during normal operation and changes state during a power failure or internal fault.
Q4: Do I need a second power supply for redundancy?
A4: No, the 3300/12-01-20-00 provides sufficient power for the entire rack. Bently Nevada specifically states that a second power supply is never required.
Q5: What operating temperature range does this unit support?
A5: This power supply operates reliably within an ambient range of 0°C to +65°C (+32°F to +150°F) , which suits most industrial environments.
| Brand Name | |
| Model No. | 3300/12-01-20-00 |
| Product Type | Power Supply |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
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